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首页> 外文期刊>Wireless Communications Letters, IEEE >An Adaptive Optimal Mapping Selection Algorithm for PNC Using Variable QAM Modulation
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An Adaptive Optimal Mapping Selection Algorithm for PNC Using Variable QAM Modulation

机译：可变QAM调制的PNC自适应最优映射选择算法。

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摘要

Fifth generation wireless networks will need to serve much higher user densities than existing 4G networks, and will therefore require an enhanced radio access network (RAN) infrastructure. Physical layer network coding (PNC) has been shown to enable such high densities with much lower backhaul load than approaches, such as Cloud-RAN and coordinated multipoint. In this letter, we present an engineering applicable PNC scheme which allows different cooperating users to use different modulation schemes, according to the relative strength of their channels to a given access point. This is in contrast with compute-and-forward and previous PNC schemes which are designed for the two-way relay channel. A two-stage search algorithm to identify the optimum PNC mappings for given channel state information and modulation is proposed in this letter. Numerical results show that the proposed scheme achieves low bit error rate with reduced backhaul load.
机译：第五代无线网络将需要提供比现有4G网络更高的用户密度，因此将需要增强的无线电接入网络（RAN）基础架构。物理层网络编码（PNC）已被证明能够以比Cloud-RAN和协作多点等方法更低的回程负载实现如此高的密度。在这封信中，我们提出了一种工程适用的PNC方案，该方案允许不同的合作用户根据其信道到给定接入点的相对强度来使用不同的调制方案。这与为双向中继信道设计的计算转发和先前的PNC方案相反。本文提出了一种两阶段搜索算法，用于识别给定信道状态信息和调制的最佳PNC映射。数值结果表明，该方案在降低回程负载的情况下，实现了较低的误码率。

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